Métodos de estimación de la exactitud posicional a través de elementos lineales

Abstract

Currently exists several developed and in process of development methods that aim to check the positional accuracy in cartography. The most extended are based in punctual features (NMAS EMAS ASPRS or NSSDA) but exists methods based on lineal elements and even on surface elements. As a result of some recent researches, this article details the most extended methods to check the positional accuracy with lineal elements. It also indicates what would be future investigation guidelines to follow on this matter. For this task, some application cases in several cartographic specialties such as coastal cartography, cadaster, roads or simply the error made by applying various generalization processes to lineal features will be analyzed. With exception of the latter, the other specialties require to get extra data from a more reliable source. Data gathering process is also analyzed because it is the greatest constraint for the application of the aforementioned methods. The advancement of new technologies as well as the geographic databases characteristics, in which usua- lly are stored lineal features, make these methods a way to check the positional accuracy to consider in the future and that will be able to compete whit the already standardized punctual element based methods.